the fact that the fbi, the fbi is taking the lead on this investigation. why is that? >> well, in addition to the fact that it's an airport, it's also unknown if this is an act of either domestic terrorism or an act of international terrorism. if it's later learned they're part of an organization, and the shooting of the tsa officer in and of itself gives the fbi jurisdiction because whether it's a shooting, a killing, or attempted killing of a federal officer. that would give the fbi the primary jurisdiction in this case. >> tom, stay with me. mary, let me bring you in. former inspector general for the u.s. department of transportation, and mary, you can talk us through, as tom was discussing, and now we have this new information that this gunman, i don't know how quickly within the airport, within those airport doors, began to open fire, pull into this bag, pull out, as the lapd is describing, this assault rifle, and open fire. but i think about not just people who are obviously in line and waiting for ticketing and things of that nature, but just airport personnel,